Unibrain 580 User Manual
Unibrain Fire-i 580/780/785/980 Operation Manual
Page 27
3.10. Shutter
Shutter is defined as the integration time of the incoming light where both the Manual and Auto Shutter are supported.
The shutter range varies from 1us ~ 3600sec. For Shutter control inquiry and status register, follow the same definition
as “BRIGHTNESS”
Shutter Speed Value & Range
1394 Shutter Value (Y)
Increment Step
Shutter Speed Time : T
Exposure Time
Range
1~500
1us
T= Y us
1us ~ 500us
501~1000
10us
T= (Y-500)*10+500 us
510us ~ 5500us
1001~1705
100us
T= (Y-1000)*100+5500 us
5.6ms ~ 76ms
1706 ~ 2399
1ms
T= (Y-1705)+76 ms
77ms ~ 770ms
2400~2902
10ms
T= (Y-2399)*10+770 ms
780ms ~ 5800ms
2903~3304
100ms
T= (Y-2902)*100+5800 ms
5.9s ~ 46s
3305~3508
1s
T= (Y-3304)*1000+46000 ms
47s ~ 250s
3509~3843
10s
T= (Y-3508)*10 + 250 s
260s ~ 3600s
Shutter Speed Example
Example Shutter Speed Table
1394 Shutter
Exposure Time
1394 Shutter
Exposure Time
1394 Shutter
Exposure Time
1
1us
1729
100ms
3378
2 min
10
10us
1829
200ms
3438
3 min
100
100us
2129
500ms
3513
5 min
500
500us
2422
1s
3525
7min
550
1ms
2522
2s
3543
10 min
650
2ms
2822
5s
3603
20 min
950
5ms
2944
10s
3663
30 min
1045
10ms
3044
20s
3723
40 min
1145
20ms
3318
60s
3783
50 min
1445
50ms
3323
65s
3843
60 min